chore: setup tests

[kaf-lamed-beyt]

fixes #21

currently setting up tests in the ts-migration branch. FOr now, I'm having some type assertion issues and only two of of the four test cases I wrote passes. When I'm done with this I'll let you know @Abhay-2811,

---------------|---------|----------|---------|---------|-------------------
File           | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s
---------------|---------|----------|---------|---------|-------------------
All files      |      40 |        0 |      25 |   41.37 |
 web3-utils.js |      40 |        0 |      25 |   41.37 | 44-76
---------------|---------|----------|---------|---------|-------------------
Test Suites: 1 failed, 1 total
Tests:       2 failed, 2 passed, 4 total
Snapshots:   0 total
Time:        4.324 s, estimated 8 s
Ran all test suites.